Bulk plant theory and operations Flashcards
Which delivery principle is the air bulk material ratio constant throughout the line?
Steady dense flow
What is the purpose of bulk plant operation?
To allow moving of bulk materials
To provide opportunity for bulk storage at district and location.
To allow for dry blending
What affects the amount of material carried by the air?
Amount of air
Size and weight of the particles
size and length of piping between tanks
pressure in holding tank and receiving tank.
What is the bulk advantages over sacks?
Higher transfer rate
Reduced man power requirements for material transfer
minimal loss of material.
what are the 2 principles of flow delivery?
Plug Flow
Steady dense flow
What are the three types of air compressor?
Reciprocating
Vane type
Rotary Axial
What are the basic parts of a bulk system?
Dust control (up)
Pressure Bessel (tall)
Weight batch blender (cone)
Additive bottle (bellow the dust control)
Moisture control system (before compressor)
Pipping
Compressor
three types of moisture control system?
Water separator (slow down) Air dryer (by absorption) After cooler (compressor discharge)
what are the 2 types of dust control device filters?
Cloth sock filter (cloth material)
Pleated paper cartridge (cartridge)
What is the minimum amount required of cement as a sample?
25 lb and kept for 30 days or the end of the well.
what is the bulk load factor?
the ratio between the actual material loaded into a silo and the absolute volume of that silo.
Put the bulk loading calculations steps into correct order:
- Calculate the maximum number of sacks that will fit into each piece of equipment.
- Determine the total amount of materials needed.
- Calculate the number of batches, the number of sacks per batch, and the amount of materials per batch.
- Determine the batch size according to the capacity of the equipment used.
- Adjust the blend size to fit the truck tanks and truck weight limitations.
- Check existing inventory to be sure adequate amounts of all required materials are available at the time of blending.
- Determine the total amount of materials needed.
- Check existing inventory to be sure adequate amounts of all required materials are available at the time of blending.
- Determine the batch size according to the capacity of the equipment used.
- Calculate the maximum number of sacks that will fit into each piece of equipment.
- Adjust the blend size to fit the truck tanks and truck weight limitations.
- Calculate the number of batches, the number of sacks per batch, and the amount of materials per batch.
What should you use on bulk silos?
Suction or discharge hoses?
Discharge hoses
Which of the following may be used on piping of silos? standard caps or blanking caps?
blanking caps
Which of the following are guidelines of STD 15 and 25
- Tank must be full
- The entrance of tank must not be blocked
- Workers must wear all EPP
- Tank mus be empty
- A buddy system should always be used.
- The entrance of tank must not be blocked
- Workers must wear all EPP
- Tank mus be empty
- A buddy system should always be used.